Inventor · disambiguated record
Charles J. Johnston
Also filed as: JOHNSTON CHARLES J
33 granted patents·1 pending application·1,393 citations·filing 1986–2012
98Inventor score
Files withEVERETT CHARLES TECH12CAPITAL FORMATION INC10EVERETT CHARLES CONTACT PROD6EVERETT CHARLES TECH INC2JOHNSTON CHARLES J2
Top patents by PatentIndex Score
34 records- 0197US5408189ATest fixture alignment system for printed circuit boardsEVERETT CHARLES TECH·Filed 1992·Granted Apr 18, 1995·212 cites·19 claims
- 0292US7862391B2Spring contact assemblyCAPITAL FORMATION INC·Filed 2008·Granted Jan 4, 2011·38 cites·18 claims
- 0392US5667410AOne-piece compliant probeEVERETT CHARLES TECH·Filed 1995·Granted Sep 16, 1997·93 cites·25 claims
- 0492US5289117ATesting of integrated circuit devices on loaded printed circuitEVERETT CHARLES TECH·Filed 1992·Granted Feb 22, 1994·72 cites·17 claims
- 0592US5032787AElectrical test probe having rotational control of the probe shaftEVERETT CHARLES CONTACT PROD·Filed 1989·Granted Jul 16, 1991·72 cites·53 claims
- 0691US6462567B1Self-retained spring probeCAPITAL FORMATION INC·Filed 2000·Granted Oct 8, 2002·77 cites·26 claims
- 0791US5049813ATesting of integrated circuit devices on loaded printed circuit boardsEVERETT CHARLES CONTACT PROD·Filed 1989·Granted Sep 17, 1991·71 cites·45 claims
- 0889US6396293B1Self-closing spring probeCAPITAL FORMATION INC·Filed 1999·Granted May 28, 2002·80 cites·20 claims
- 0989US5865641ASolid spring electrical contacts for electrical connectors and probesCAPITAL FORMATION INC·Filed 1995·Granted Feb 2, 1999·65 cites·50 claims
- 1088US8105119B2Flat plunger round barrel test probeSWART MARK A·Filed 2010·Granted Jan 31, 2012·9 cites·21 claims
- 1186US8523579B2Spring contact assemblyJOHNSTON CHARLES J·Filed 2012·Granted Sep 3, 2013·19 cites·9 claims
- 1286US5321351ATest fixture alignment systemEVERETT CHARLES TECH·Filed 1991·Granted Jun 14, 1994·62 cites·35 claims
- 1386US5180976AIntegrated circuit carrier having built-in circuit verificationEVERETT CHARLES CONTACT PROD·Filed 1991·Granted Jan 19, 1993·50 cites·6 claims
- 1485US6084421ATest socketCAPITAL FORMATION INC·Filed 1998·Granted Jul 4, 2000·62 cites·18 claims
- 1581US8231416B2Spring contact assemblyJOHNSTON CHARLES J·Filed 2010·Granted Jul 31, 2012·11 cites·14 claims
- 1681US5300881ATest fixtureEVERETT CHARLES TECH·Filed 1993·Granted Apr 5, 1994·40 cites·30 claims
- 1777US5663655AESD protection for universal grid type test fixturesEVERETT CHARLES TECH·Filed 1995·Granted Sep 2, 1997·46 cites·6 claims
- 1877US5391995ATwisting electrical test probe with controlled pointing accuracyEVERETT CHARLES TECH·Filed 1994·Granted Feb 21, 1995·40 cites·4 claims
- 1972US6204680B1Test socketCAPITAL FORMATION INC·Filed 1998·Granted Mar 20, 2001·37 cites·7 claims
- 2071US5444387ATest module hanger for test fixturesEVERETT CHARLES TECH·Filed 1994·Granted Aug 22, 1995·24 cites·8 claims
- 2171US5270641ADual side access test fixtureEVERETT CHARLES TECH·Filed 1992·Granted Dec 14, 1993·34 cites·24 claims
- 2270US5247246ATesting of integrated circuit devices on loaded printed circuit boardsEVERETT CHARLES TECH·Filed 1991·Granted Sep 21, 1993·31 cites·18 claims
- 2367US4983909ARepetitive-switchingEVERETT CHARLES CONTACT PROD·Filed 1989·Granted Jan 8, 1991·22 cites·6 claims
- 2465US5422575ATest fixture with adjustable bearings and optical alignment systemEVERETT CHARLES TECH·Filed 1994·Granted Jun 6, 1995·21 cites·1 claims
- 2563US6271672B1Biased BGA contactor probe tipCAPITAL FORMATION INC·Filed 1998·Granted Aug 7, 2001·23 cites·10 claims
- 2659USD400811STest probe plunger tipCAPITAL FORMATION INC·Filed 1997·Granted Nov 10, 1998·10 cites·1 claims
- 2751US6414504B2Coaxial tilt pin fixture for testing high frequency circuit boardsCAPITAL FORMATION INC·Filed 1999·Granted Jul 2, 2002·15 cites·30 claims
- 2851US4720275AQuick termination apparatus and method for electrical connectorEVERETT CHARLES CONTACT PROD·Filed 1986·Granted Jan 19, 1988·16 cites·27 claims
- 2948US5781023AHollow plunger test probeDELWARE CAPITAL FORMATION INC·Filed 1997·Granted Jul 14, 1998·16 cites·22 claims
- 3044US5134280AOptical fiber test probe having a sleeve-like plunger movable in a barrelEVERETT CHARLES CONTACT PROD·Filed 1991·Granted Jul 28, 1992·11 cites·14 claims
- 3141USD343802SCoaxial test probeEVERETT CHARLES TECH INC·Filed 1992·Granted Feb 1, 1994·5 cites·1 claims
- 3238US2001000947A1Test socketCAPITAL FORMATION INC·Filed 2000·Application pending·0 cites
- 3336US5557211AVacuum test fixture for printed circuit boardsEVERETT CHARLES TECH·Filed 1995·Granted Sep 17, 1996·5 cites·1 claims
- 3433USD395016SCoaxial test probe with quadrature ground provisionEVERETT CHARLES TECH INC·Filed 1997·Granted Jun 9, 1998·4 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →